Cooling means for explosive-engines



PATBNTED mm, 1904. H. NELSON.

COOLING MEANS FOR EXPLOSIVE ENGINES.

APPLIGATIQN FILED NOV.,24. 1902.

N0 MODEL.

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UNITED STATES Patented February 2, 1904.

PATENT OFFICE.

' HILDING NELSON, OF NEW BRITAIN, CONNECTICUT.

COOLING MEANS FOR EXPLOSIVE-ENGINES- SPECIFICATION forming part of Letters Patent N0. 750,885, dated February 2, 1904..

Application filed November 24, 1902. Serial No. 132,549. (No model.)

To aZZ whom it may concern.-

' Be it known that I, HILDING NELsoN, a citizen of the United States of America, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Cooling Means for Explosive-Engines, of which the following is a specification.

My invention relates particularly to improvements in the means for cooling the cylinders of explosive-engines otherwise than by water-jackets.

Referring to the drawings, Figure 1 is a side sectional view of a cylinder with my invention applied thereto. Fig. 2 is a cross-sectional View. Fig. 3 is a detail-view of one of the radiating-coils.

As is well known, the cylinder of an explosive-engine becomes heated very quickly when the engine is in action, and some means must be employed to keep the cylinder cool in order that the efiiciency of the engine shall not be decreased. 'Waterjackets for cylinders are of course very old; but on explosive-engines, especially those used on automobiles and like machines, it has beenfound very difficult to keep the packing sufiiciently tight, so that there will be no leakage, and the use of a water-jacket necessitates the use of a pump to keep the water circulating and requires rather.

delicate connections and arrangements, which get out of order easily. Then the added weight and expense of the circulating-pump and its appurtenant parts is still another objection to the use of a water-jacket on cylinders of this kind.

I make use of a number. of spiral springs (five hundred) made out of wire of small diameter and coiled so that the entire surface of the wire is surrounded by air. These coils are arranged in rows circumferentially about the cylinder and held in position, as willbe hereinafter described. There are a number of rows of these coils extending from end to end of the cylinder, and the coils in one row are staggered relatively to the coils in the next succeeding row, so that the passage between any two coils in the same row is obstructed by a coil in the next row. This is clearly shown in Fig. 2 of the drawings, where 5 the unshaded coils are supposed to be in one row and the shaded coils are supposed to be in the next row beyond.

Annular grooves are formed in the surface of the cylinder, as shown at B. The end of a coil 5 5 is placed in a groove and by specially-formed tools the grooves are closed over the wire, as clearly shown in Fig. 3, firmly anchoring the end of the coil to the cylinder. The outer ends of the coils pass through spacing-strips C. Funnel-like plates D are secured to thesespacing-strips, their interior diameter being such that when they are put in place they compress the coils slightly, the steady pressure of all of the coils against these funnel-shaped plates and 5 against the spacing-strips tending to keep all of the parts in line with sufiicient rigidity to prevent any rattling or loosening of any of the parts. Preferably there is a funnel-shaped plate for each row of coils, it being fastened 7 to the spacing-strips just over the coils. These funnel-shaped plates are of course to be arranged so that they will catch the air and lead it down into the coils, and they increase in diameter from the forward and to the rear end of the cylinder, so that the action of one plate will not be interfered with by the plate immediately in front of it. If desired,a larger funnel G may be suitably supported about the cylinder and the radiating mechanism in order to insure a sufificient quantity of air being continually led in among the coils. Preferably the spacing-strips C are fastened to the cylinder, as at K, compressing the end coils slightly for the purposes above mentioned. E} 5 The method of operation of a radiating device of this kind is readily understood. The wire of small diameter which makes up the coils will lead the heat from the cylinder out toward its ends. The air rushing in through 9 the funnels and through the coils is thoroughly churned up and the staggering of the coils from front to back of the cylinder insures all of the coils being brought into contact with the cool air. The coils themselves present the greatest possible amount of radiating-surface for the space which they occupy and being of a small diameter are particularly sensitive to the heat and cold and will more readily lead the heat from the cylinder than would solid bodies of larger size.

I am aware that my invention may be modified and altered in certain particulars, and I wish to include herein any and all such modifications which do not depart from the spirit of the invention.

I claim as my invention 1. The combination with the cylinder of an explosive-engine, of annular sockets formed in the outer surface of said cylinder but not penetrating the walls thereof, coils extending outwardly from the surface of the cylinder, one end of said coils being located in said annular sockets and engaged by ledges projecting from the walls of the sockets.

2. In a device of the class specified, the combination with the cylinder of an explosive-engine of radiating-coils extending radially from the surface of the cylinder, means for positioning the base of the coils on the cylinder, and spacing devices for the outer ends of the coils, substantially as described and for the purposes set forth.

3. In a device of the class specified in combination the cylinder of an explosive-engine, the radially-disposed radiating-coils, the spacing device, and the funnels, all arranged to operate substantially as described and for the purposes set forth.

4:. In a device of the class specified the combination with the cylinder of an. explosive-engine, of a series of radiating-coils, annular grooves in the surface of the cylinder adapted to receive the bases of the coils and to retain said coils securely in place.

5. In a device of the class specified the combination with the cylinder of an explosive-engine, of two or more rows of radiating-coils arranged circumferentially about the cylinder and extending outward from the surface thereof, the coils in one row being staggered with relation to those in the next adjacent row.

6. In a device of the class specified the combination with the cylinder of an explosive-engine, of, two or more rows of annular grooves arranged circumferentially about the outer surface of the cylinder, spiral radiating-coils having their bases in said grooves, and funnel-shaped plates extending outwardly from the outer ends of said radiating-coils.

7 In a device of the class specified the combination with the cylinder of an explosive-engine and the radiating-coils arranged in a series of circumferential rows, of funnel-shaped plates resting on the ends of the coils in each row and extending outwardly therefrom.

8. In a device of the class specified the combination with the cylinder of an explosive-engine and the radiating-coils arranged in a series of circumferential rows, of funnel-shaped plates resting on the ends of the coils in each row and extending outwardly therefrom, the outside diameter of each funnel-shaped plate being smaller than that of the one immediately back of it, substantially as described and for the purposes set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

HILDING NELSON. Witnesses:

H. E. HART, D. I. KREIMENDAHL. 

